Humans have small mites that live in hair follicles and oil glands around the nose and eyelashes. What
would you need to know to classify them as exhibiting mutualism, commensalisms, or parasitism? What will be an ideal response?
Concepts to Consider: In mutualism, benefits are confered to both species involved (Do the mites
benefit? Do humans benefit from mites living in our skin?). Commensalism involves a benefit to one
partner and no benefit or harm to the other partner (If the mites benefit, do we notice their presence?).
Parasites benefit from the host, which is harmed to some degree (Assuming the mites benefit, are we
harmed?).
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Which organs have a surface area to volume ratio that is specially optimized to absorb oxygen? (Check all that apply)
_____ Moth antennae _____ Intestines _____ Fish gills _____ Neurons _____ Frog skin
The ____ spend most of their lives as individual haploid organisms
a. cellular slime molds b. plasmodial slime molds c. amoebas d. multi-celled protists e. single-celled protists
The first step of the scientific method is to
a. ask a question. b. construct a hypothesis. c. observe carefully. d. formulate a prediction.
The "grandmother hypothesis" suggests that natural selection may have favored a woman ________
A) moving away from her children and grandchildren B) focusing her energy on caring for her grandchildren, instead of producing more children C) focusing her energy on the production of as many children as possible before reaching menopause D) helping her sisters produce more children